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Mount Woolnough: the submerged volcano, SE of Sydney, NSW
Ist Teil von
Australian journal of earth sciences, 2014-01, Vol.61 (6), p.811-818
Ort / Verlag
Taylor & Francis
Erscheinungsjahr
2014
Link zum Volltext
Quelle
Taylor & Francis Current Content Access
Beschreibungen/Notizen
Part of a larger investigation of the sea bed off Sydney was a study of the extinct submarine volcano Mount Woolnough. It is located approximately 41 km east of Kurnell, NSW, and protrudes 175 m above the sediment cover at depths of approximately −550 to −375 m. Volcanic rock, approximately 2.2 km in diameter, is exposed above the sediment sea floor and is much smaller than its magnetic expression (approximately 13 km in diameter). Samples dredged from Mount Woolnough were conglomerates with phosphatic nodules and volcanic fragments set in a fine foraminiferal sediment matrix. Zircons within the mafic fragments yielded a minimum age of 261 Ma.